Question

我有一个AbstractShape类，它向面板绘制一个形状（这个类是抽象的，并且有“Rect”和“Oval”类来扩展它）。我正在尝试使用javax计时器以使形状闪烁（通过每隔2秒再次填充和绘制它）。当我运行该功能时，只有当我调整屏幕大小时，形状才会改变其“填充”，我不明白为什么：（

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public abstract class AbstractShape extends JPanel implements Shape{

private int x;
private int y;
private int width;
private int height;
private boolean isFilled;
private Color color;

public AbstractShape(int x, int y, int width, int height, boolean isFilled, Color color) {
    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
    this.isFilled = isFilled;
    this.color = color;
}

@Override
public int getX() {
    return x;
}

public void setX(int x) {
    this.x = x;
}

@Override
public int getY() {
    return y;
}

public void setY(int y) {
    this.y = y;
}

@Override
public int getWidth() {
    return width;
}

public void setWidth(int width) {
    this.width = width;
}

@Override
public int getHeight() {
    return height;
}

public void setHeight(int height) {
    this.height = height;
}

@Override
public boolean isFilled() {
    return isFilled;
}

public void setFilled(boolean filled) {
    isFilled = filled;
}

@Override
public Color getColor() {
    return color;
}

public void setColor(Color color) {
    this.color = color;
}

@Override
public boolean equals (Object O){
    if (O instanceof AbstractShape){
        if (this.getWidth() == ((AbstractShape) O).getWidth() && this.getHeight() == ((AbstractShape) O).getHeight()){
            return true;
        }
    }
    return false;
}

public void changeFill(){
    ActionListener listener = new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            if (isFilled() == true){
                isFilled = false;
                repaint();
            }else{
                isFilled = true;
                repaint();
            }
        }
    };
    Timer timer = new Timer(2000,listener);
    timer.setInitialDelay(0);
    while(true){
        timer.start();
    }
}

@Override
public void paintComponent(Graphics g) {

}

public void draw(JPanel panel){
    panel.add(this);
    panel.setVisible(true);
}

}

这是“AbstractShape”类，里面的“changeFill”函数需要使形状闪现。

@Override
public void paintComponent(Graphics g) {
    super.paintComponent(g);
    g.setColor(this.getColor());
    if (this.isFilled()){
        g.fillRect(0,0,this.getWidth(),this.getHeight());
    }
    else{
        g.drawRect(0,0,this.getWidth(),this.getHeight());
    }
}

这是绘制矩形的“Rect”paintComponent函数。

public static void main (String [] args){
    // TODO: MAGIC NUMBERS!!!!
    GuiManagement g = new GuiManagement();
    JFrame frame = g.createScreen();
    JPanel panel = new JPanel();
    panel.setBounds(0,0,700,1000);
    frame.add(panel);
    Rect r = new Rect(20,20,300,300,false,Color.BLUE);
    r.draw(panel);
    frame.setLayout(new BorderLayout());
    frame.setVisible(true);
    r.changeFill();
}

这是创建框架，面板，矩形并调用ChangeFill函数的主要功能。谢谢你的帮助：）

Javax计时器问题

0 个答案: